/usr/include/trilinos/Teuchos_ReductionOp.hpp is in libtrilinos-teuchos-dev 12.10.1-3.
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// ***********************************************************************
//
// Teuchos: Common Tools Package
// Copyright (2004) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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// @HEADER
#ifndef TEUCHOS_REDUCTION_OP_HPP
#define TEUCHOS_REDUCTION_OP_HPP
#include "Teuchos_Describable.hpp"
namespace Teuchos {
/** \brief Base interface class for user-defined reduction operations for
* objects that use value semantics.
*
* ToDo: Finish documentation!
*
* \note Ordinal refers to the template parameter of \c Comm, not to
* the type of array indices.
*/
template<typename Ordinal, typename T>
class ValueTypeReductionOp : public Describable {
public:
/** \brief . */
virtual void reduce(
const Ordinal count,
const T inBuffer[],
T inoutBuffer[]
) const = 0;
};
/** \brief Base interface class for user-defined reduction operations for
* objects that use reference semantics.
*
* ToDo: Finish documentation!
*
* \note Ordinal refers to the template parameter of \c Comm, not to
* the type of array indices.
*/
template<typename Ordinal, typename T>
class ReferenceTypeReductionOp : public Describable {
public:
/** \brief . */
virtual void reduce(
const Ordinal count,
const T*const inBuffer[],
T*const inoutBuffer[]
) const = 0;
};
} // namespace Teuchos
#endif // TEUCHOS_REDUCTION_OP_HPP
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